Update musyx.cpp
Fix title case, remove leftover header, add a TODO (was there supposed to be a comment there?), convert multi line comments into single line comments, fix typos, add newline
This commit is contained in:
Derek "Turtle" Roe
parent
7f0e8a84cf
commit
ba36ce31bb
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@ -1,8 +1,3 @@
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// Project64 - A Nintendo 64 emulator
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// http://www.pj64-emu.com/
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// Copyright(C) 2001-2021 Project64
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// Copyright(C) 2013 Bobby Smiles
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// GNU/GPLv2 licensed: https://gnu.org/licenses/gpl-2.0.html
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#include "stdafx.h"
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#include <string.h>
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@ -10,7 +5,8 @@
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#include "audio.h"
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#include "mem.h"
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/* various constants */
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// Various constants
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enum { SUBFRAME_SIZE = 192 };
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enum { MAX_VOICES = 32 };
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@ -24,7 +20,7 @@ enum
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SFD_SFX_PTR = 0xc,
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SFD_VOICES = 0x10,
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/* v2 only */
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// v2 only
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SFD2_10_PTR = 0x10,
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SFD2_14_BITMASK = 0x14,
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SFD2_15_BITMASK = 0x15,
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@ -47,11 +43,11 @@ enum
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VOICE_ADPCM_FRAMES = 0x3c,
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VOICE_SKIP_SAMPLES = 0x3e,
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/* for PCM16 */
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// For PCM16
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VOICE_U16_40 = 0x40,
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VOICE_U16_42 = 0x42,
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/* for ADPCM */
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// For ADPCM
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VOICE_ADPCM_TABLE_PTR = 0x40,
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VOICE_INTERLEAVED_PTR = 0x44,
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@ -93,25 +89,27 @@ enum
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SFX_FIR4_HCOEFFS = 0x40
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};
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/* struct definition */
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// Struct definition
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typedef struct
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{
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/* internal subframes */
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// Internal sub-frames
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int16_t left[SUBFRAME_SIZE];
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int16_t right[SUBFRAME_SIZE];
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int16_t cc0[SUBFRAME_SIZE];
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int16_t e50[SUBFRAME_SIZE];
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/* internal subframes base volumes */
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// Internal sub-frames base volumes
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int32_t base_vol[4];
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/* */
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// TODO: comment?
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int16_t subframe_740_last4[4];
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} musyx_t;
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typedef void (*mix_sfx_with_main_subframes_t)(musyx_t *musyx, const int16_t *subframe, const uint16_t* gains);
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/* helper functions prototypes */
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// Helper functions prototypes
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static void load_base_vol(CHle * hle, int32_t *base_vol, uint32_t address);
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static void save_base_vol(CHle * hle, const int32_t *base_vol, uint32_t address);
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static void update_base_vol(CHle * hle, int32_t *base_vol, uint32_t voice_mask, uint32_t last_sample_ptr, uint8_t mask_15, uint32_t ptr_24);
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@ -150,9 +148,8 @@ static int32_t dot4(const int16_t *x, const int16_t *y)
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return accu;
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}
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/**************************************************************************
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* MusyX v1 audio ucode
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**************************************************************************/
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// MusyX v1 audio microcode
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void musyx_v1_task(CHle * hle)
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{
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uint32_t sfd_ptr = *dmem_u32(hle, TASK_DATA_PTR);
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@ -164,14 +161,14 @@ void musyx_v1_task(CHle * hle)
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state_ptr = *dram_u32(hle, sfd_ptr + SFD_STATE_PTR);
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/* load initial state */
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// Load initial state
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load_base_vol(hle, musyx.base_vol, state_ptr + STATE_BASE_VOL);
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dram_load_u16(hle, (uint16_t *)musyx.cc0, state_ptr + STATE_CC0, SUBFRAME_SIZE);
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dram_load_u16(hle, (uint16_t *)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4_V1, 4);
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for (;;)
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{
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/* parse SFD structure */
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// Parse SFD structure
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uint16_t sfx_index = *dram_u16(hle, sfd_ptr + SFD_SFX_INDEX);
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uint32_t voice_mask = *dram_u32(hle, sfd_ptr + SFD_VOICE_BITMASK);
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uint32_t sfx_ptr = *dram_u32(hle, sfd_ptr + SFD_SFX_PTR);
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@ -179,17 +176,17 @@ void musyx_v1_task(CHle * hle)
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uint32_t last_sample_ptr = state_ptr + STATE_LAST_SAMPLE;
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uint32_t output_ptr;
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/* initialize internal subframes using updated base volumes */
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// Initialize internal sub-frames using updated base volumes
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update_base_vol(hle, musyx.base_vol, voice_mask, last_sample_ptr, 0, 0);
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init_subframes_v1(&musyx);
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/* active voices get mixed into L,R,cc0,e50 subframes (optional) */
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// Active voices get mixed into L,R,cc0,e50 subframes (optional)
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output_ptr = voice_stage(hle, &musyx, voice_ptr, last_sample_ptr);
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/* apply delay-based effects (optional) */
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// Apply delay-based effects (optional)
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sfx_stage(hle, mix_sfx_with_main_subframes_v1, &musyx, sfx_ptr, sfx_index);
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/* emit interleaved L,R subframes */
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// Emit interleaved L,R sub-frames
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interleave_stage_v1(hle, &musyx, output_ptr);
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--sfd_count;
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@ -202,15 +199,14 @@ void musyx_v1_task(CHle * hle)
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state_ptr = *dram_u32(hle, sfd_ptr + SFD_STATE_PTR);
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}
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/* writeback updated state */
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// Writeback updated state
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save_base_vol(hle, musyx.base_vol, state_ptr + STATE_BASE_VOL);
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dram_store_u16(hle, (uint16_t *)musyx.cc0, state_ptr + STATE_CC0, SUBFRAME_SIZE);
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dram_store_u16(hle, (uint16_t *)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4_V1, 4);
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}
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/**************************************************************************
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* MusyX v2 audio ucode
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**************************************************************************/
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// MusyX v2 audio microcode
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void musyx_v2_task(CHle * hle)
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{
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uint32_t sfd_ptr = *dmem_u32(hle, TASK_DATA_PTR);
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@ -221,7 +217,7 @@ void musyx_v2_task(CHle * hle)
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for (;;)
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{
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/* parse SFD structure */
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// Parse SFD structure
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uint16_t sfx_index = *dram_u16(hle, sfd_ptr + SFD_SFX_INDEX);
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uint32_t voice_mask = *dram_u32(hle, sfd_ptr + SFD_VOICE_BITMASK);
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uint32_t state_ptr = *dram_u32(hle, sfd_ptr + SFD_STATE_PTR);
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@ -240,31 +236,31 @@ void musyx_v2_task(CHle * hle)
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uint32_t last_sample_ptr = state_ptr + STATE_LAST_SAMPLE;
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uint32_t output_ptr;
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/* load state */
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// Load state
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load_base_vol(hle, musyx.base_vol, state_ptr + STATE_BASE_VOL);
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dram_load_u16(hle, (uint16_t *)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4_V2, 4);
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/* initialize internal subframes using updated base volumes */
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// Initialize internal sub-frames using updated base volumes
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update_base_vol(hle, musyx.base_vol, voice_mask, last_sample_ptr, mask_15, ptr_24);
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init_subframes_v2(&musyx);
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if (ptr_10)
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{
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/* TODO */
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// TODO:
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hle->WarnMessage("ptr_10=%08x mask_14=%02x ptr_24=%08x", ptr_10, mask_14, ptr_24);
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}
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/* active voices get mixed into L,R,cc0,e50 subframes (optional) */
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// Active voices get mixed into L,R,cc0,e50 sub-frames (optional)
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output_ptr = voice_stage(hle, &musyx, voice_ptr, last_sample_ptr);
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/* apply delay-based effects (optional) */
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// Apply delay-based effects (optional)
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sfx_stage(hle, mix_sfx_with_main_subframes_v2, &musyx, sfx_ptr, sfx_index);
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dram_store_u16(hle, (uint16_t*)musyx.left, output_ptr , SUBFRAME_SIZE);
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dram_store_u16(hle, (uint16_t*)musyx.right, output_ptr + 2*SUBFRAME_SIZE, SUBFRAME_SIZE);
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dram_store_u16(hle, (uint16_t*)musyx.cc0, output_ptr + 4*SUBFRAME_SIZE, SUBFRAME_SIZE);
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/* store state */
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// Store state
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save_base_vol(hle, musyx.base_vol, state_ptr + STATE_BASE_VOL);
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dram_store_u16(hle, (uint16_t*)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4_V2, 4);
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@ -318,7 +314,7 @@ static void update_base_vol(CHle * hle, int32_t *base_vol,
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hle->VerboseMessage("base_vol voice_mask = %08x", voice_mask);
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hle->VerboseMessage("BEFORE: base_vol = %08x %08x %08x %08x", base_vol[0], base_vol[1], base_vol[2], base_vol[3]);
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/* optim: skip voices contributions entirely if voice_mask is empty */
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// optimization: skip voices contributions entirely if voice_mask is empty
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if (voice_mask != 0)
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{
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for (i = 0, mask = 1; i < MAX_VOICES; ++i, mask <<= 1, last_sample_ptr += 8)
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@ -335,7 +331,7 @@ static void update_base_vol(CHle * hle, int32_t *base_vol,
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}
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}
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/* optim: skip contributions entirely if mask_15 is empty */
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// optimization: skip contributions entirely if mask_15 is empty
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if (mask_15 != 0)
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{
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for(i = 0, mask = 1; i < 4; ++i, mask <<= 1, ptr_24 += 8)
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@ -352,7 +348,7 @@ static void update_base_vol(CHle * hle, int32_t *base_vol,
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}
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}
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/* apply 3% decay */
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// Apply 3% decay
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for (k = 0; k < 4; ++k)
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{
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base_vol[k] = (base_vol[k] * 0x0000f850) >> 16;
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@ -406,29 +402,30 @@ static void init_subframes_v2(musyx_t *musyx)
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}
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}
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/* Process voices, and returns interleaved subframe destination address */
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// Process voices, and returns interleaved sub-frame destination address
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static uint32_t voice_stage(CHle * hle, musyx_t *musyx, uint32_t voice_ptr, uint32_t last_sample_ptr)
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{
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uint32_t output_ptr;
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int i = 0;
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/* voice stage can be skipped if first voice has no samples */
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// Voice stage can be skipped if first voice has no samples
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if (*dram_u16(hle, voice_ptr + VOICE_CATSRC_0 + CATSRC_SIZE1) == 0)
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{
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hle->VerboseMessage("Skipping Voice stage");
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hle->VerboseMessage("Skipping voice stage");
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output_ptr = *dram_u32(hle, voice_ptr + VOICE_INTERLEAVED_PTR);
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}
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else
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{
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/* otherwise process voices until a non null output_ptr is encountered */
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// Otherwise process voices until a non null output_ptr is encountered
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for (;;)
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{
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/* load voice samples (PCM16 or APDCM) */
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// Load voice samples (PCM16 or APDCM)
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int16_t samples[SAMPLE_BUFFER_SIZE];
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unsigned segbase;
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unsigned offset;
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hle->VerboseMessage("Processing Voice #%d", i);
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hle->VerboseMessage("Processing voice #%d", i);
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if (*dram_u8(hle, voice_ptr + VOICE_ADPCM_FRAMES) == 0)
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{
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@ -439,17 +436,17 @@ static uint32_t voice_stage(CHle * hle, musyx_t *musyx, uint32_t voice_ptr, uint
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load_samples_ADPCM(hle, voice_ptr, samples, &segbase, &offset);
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}
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/* mix them with each internal subframes */
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// Mix them with each internal sub-frame
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mix_voice_samples(hle, musyx, voice_ptr, samples, segbase, offset, last_sample_ptr + i * 8);
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/* check break condition */
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// Check break condition
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output_ptr = *dram_u32(hle, voice_ptr + VOICE_INTERLEAVED_PTR);
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if (output_ptr != 0)
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{
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break;
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}
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/* next voice */
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// Next voice
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++i;
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voice_ptr += VOICE_SIZE;
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}
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@ -524,8 +521,8 @@ static void load_samples_PCM16(CHle * hle, uint32_t voice_ptr, int16_t *samples,
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static void load_samples_ADPCM(CHle * hle, uint32_t voice_ptr, int16_t *samples, unsigned *segbase, unsigned *offset)
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{
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/* decompressed samples cannot exceed 0x400 bytes;
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* ADPCM has a compression ratio of 5/16 */
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// Decompressed samples cannot exceed 0x400 bytes
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// ADPCM has a compression ratio of 5/16
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uint8_t buffer[SAMPLE_BUFFER_SIZE * 2 * 5 / 16];
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int16_t adpcm_table[128];
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@ -620,16 +617,16 @@ static void mix_voice_samples(CHle * hle, musyx_t *musyx, uint32_t voice_ptr, co
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{
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int i, k;
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/* parse VOICE structure */
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// Parse VOICE structure
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const uint16_t pitch_q16 = *dram_u16(hle, voice_ptr + VOICE_PITCH_Q16);
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const uint16_t pitch_shift = *dram_u16(hle, voice_ptr + VOICE_PITCH_SHIFT); /* Q4.12 */
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const uint16_t pitch_shift = *dram_u16(hle, voice_ptr + VOICE_PITCH_SHIFT); // Q4.12
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const uint16_t end_point = *dram_u16(hle, voice_ptr + VOICE_END_POINT);
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const uint16_t restart_point = *dram_u16(hle, voice_ptr + VOICE_RESTART_POINT);
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const uint16_t u16_4e = *dram_u16(hle, voice_ptr + VOICE_U16_4E);
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/* init values and pointers */
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// Initialize values and pointers
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const int16_t *sample = samples + segbase + offset + u16_4e;
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const int16_t *const sample_end = samples + segbase + end_point;
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const int16_t *const sample_restart = samples + (restart_point & 0x7fff) +
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@ -655,7 +652,7 @@ static void mix_voice_samples(CHle * hle, musyx_t *musyx, uint32_t voice_ptr, co
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for (i = 0; i < SUBFRAME_SIZE; ++i)
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{
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/* update sample and lut pointers and then pitch_accu */
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// Update sample and LUT pointers and then pitch_accu
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const int16_t *lut = (RESAMPLE_LUT + ((pitch_accu & 0xfc00) >> 8));
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int dist;
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int16_t v;
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@ -664,30 +661,30 @@ static void mix_voice_samples(CHle * hle, musyx_t *musyx, uint32_t voice_ptr, co
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pitch_accu &= 0xffff;
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pitch_accu += pitch_step;
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/* handle end/restart points */
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// Handle end/restart points
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dist = sample - sample_end;
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if (dist >= 0)
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{
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sample = sample_restart + dist;
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}
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/* apply resample filter */
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// Apply resample filter
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v = clamp_s16(dot4(sample, lut));
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for (k = 0; k < 4; ++k)
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{
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/* envmix */
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// Envmix
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int32_t accu = (v * (v4_env[k] >> 16)) >> 15;
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v4[k] = clamp_s16(accu);
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*(v4_dst[k]) = clamp_s16(accu + *(v4_dst[k]));
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/* update envelopes and dst pointers */
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// Update envelopes and DST pointers
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++(v4_dst[k]);
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v4_env[k] += v4_env_step[k];
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}
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}
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/* save last resampled sample */
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// Save last resampled sample
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dram_store_u16(hle, (uint16_t *)v4, last_sample_ptr, 4);
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hle->VerboseMessage("last_sample = %04x %04x %04x %04x", v4[0], v4[1], v4[2], v4[3]);
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@ -722,7 +719,7 @@ static void sfx_stage(CHle * hle, mix_sfx_with_main_subframes_t mix_sfx_with_mai
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return;
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}
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/* load sfx parameters */
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// Load SFX parameters
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cbuffer_ptr = *dram_u32(hle, sfx_ptr + SFX_CBUFFER_PTR);
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cbuffer_length = *dram_u32(hle, sfx_ptr + SFX_CBUFFER_LENGTH);
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@ -742,7 +739,7 @@ static void sfx_stage(CHle * hle, mix_sfx_with_main_subframes_t mix_sfx_with_mai
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hle->VerboseMessage("tap count=%d\n" "delays: %08x %08x %08x %08x %08x %08x %08x %08x\n" "gains: %04x %04x %04x %04x %04x %04x %04x %04x", tap_count, tap_delays[0], tap_delays[1], tap_delays[2], tap_delays[3], tap_delays[4], tap_delays[5], tap_delays[6], tap_delays[7], tap_gains[0], tap_gains[1], tap_gains[2], tap_gains[3], tap_gains[4], tap_gains[5], tap_gains[6], tap_gains[7]);
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hle->VerboseMessage("sfx_gains=%04x %04x", sfx_gains[0], sfx_gains[1]);
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/* mix up to 8 delayed subframes */
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// Mix up to 8 delayed sub-frames
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memset(subframe, 0, SUBFRAME_SIZE * sizeof(subframe[0]));
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for (i = 0; i < tap_count; ++i)
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{
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@ -764,10 +761,10 @@ static void sfx_stage(CHle * hle, mix_sfx_with_main_subframes_t mix_sfx_with_mai
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mix_subframes(subframe, delayed, tap_gains[i]);
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}
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/* add resulting subframe to main subframes */
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// Add resulting sub-frame to main sub-frames
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mix_sfx_with_main_subframes(musyx, subframe, sfx_gains);
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/* apply FIR4 filter and writeback filtered result */
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// Apply FIR4 filter and writeback filtered result
|
||||
memcpy(buffer, musyx->subframe_740_last4, 4 * sizeof(int16_t));
|
||||
memcpy(musyx->subframe_740_last4, subframe + SUBFRAME_SIZE - 4, 4 * sizeof(int16_t));
|
||||
mix_fir4(musyx->e50, buffer + 1, fir4_hgain, fir4_hcoeffs);
|
||||
|
|
@ -870,7 +867,7 @@ static void interleave_stage_v2(CHle * hle, musyx_t *musyx, uint16_t mask_16, ui
|
|||
|
||||
hle->VerboseMessage("mask_16=%04x ptr_18=%08x ptr_1c=%08x output_ptr=%08x", mask_16, ptr_18, ptr_1c, output_ptr);
|
||||
|
||||
/* compute L_total, R_total and update subframe @ptr_1c */
|
||||
// Compute L_total, R_total and update sub-frame @ptr_1c
|
||||
memset(subframe, 0, SUBFRAME_SIZE*sizeof(subframe[0]));
|
||||
|
||||
for(i = 0; i < SUBFRAME_SIZE; ++i)
|
||||
|
|
@ -901,7 +898,7 @@ static void interleave_stage_v2(CHle * hle, musyx_t *musyx, uint16_t mask_16, ui
|
|||
}
|
||||
}
|
||||
|
||||
/* interleave L_total and R_total */
|
||||
// Interleave L_total and R_total
|
||||
dst = dram_u32(hle, output_ptr);
|
||||
for(i = 0; i < SUBFRAME_SIZE; ++i)
|
||||
{
|
||||
|
|
@ -910,6 +907,6 @@ static void interleave_stage_v2(CHle * hle, musyx_t *musyx, uint16_t mask_16, ui
|
|||
*(dst++) = (l << 16) | r;
|
||||
}
|
||||
|
||||
/* writeback subframe @ptr_1c */
|
||||
// Writeback sub-frame @ptr_1c
|
||||
dram_store_u16(hle, (uint16_t*)subframe, ptr_1c, SUBFRAME_SIZE);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue